A Long Island club owner claims he has proof that an off-duty Suffolk cop beat him senseless without cause — the officer’s own recorded words.

Former minor-league pitcher Tim Lorito, the owner of The Emporium in Patchogue, secretly taped Officer Gregg Drzal on an iPhone as the cop profusely apologized for attacking him during a brawl in December 2013.

An angry Drzal had gone to the popular venue and attacked Lorito after the cop’s three sons were tossed out for fighting, according to Lorito’s civil lawsuit against Drzal, the Suffolk County Police Department and several officers.

“I want you to hear it from me. I’m wrong,” Drzal said on the recording of the January 2014 meeting, a copy of which was obtained by The Post.

“I’m stupid. I’m sorry. I just want you to hear those words. There’s no defense.”

The Emporium owner Tim Lorito.Victor Alcorn

In addition to the federal civil case, Drzal is facing a criminal assault rap stemming from the ugly incident, which was caught on a video also obtained by The Post.

Lorito’s suit claims Drzal’s sons screamed “expletives and exhibited belligerent behavior in front of the venue” after they were ejected for fighting with customers and bouncers.

They later “stated that their father, Officer Gregg Drzal, was coming to the venue, that ‘you guys ­f- -ked with the wrong people’ and that the police were going to shut the venue down.”

The irate dad soon arrived and promptly attacked Lorito, calling him a “b- - -h” and a ­“f- - - -t” before punching him and hitting him in the face with a metal barricade, court papers state.

Lorito claims he still suffers from vision loss after Drzal hit him in the eye.

Several months after the confrontation, Lorito hired a Brooklyn private eye to help record Drzal during a prearranged meeting at a Suffolk County restaurant.

Using an iPhone app, Lorito secretly captured Drzal apologizing for the incident and rambling on about how business was conducted in his precinct.

Lorito and a spokesperson for the Suffolk Police Department declined to discuss the case.